Press



Oct. 16, 1928. I 1,687,968

A. BREDENBERG PRESS Filed Dec. 31, 1925 2 Sheets-Sheet 1 INVENTOR ATTORNEYQ, I

2 Sheets-Sheet A. BREDENBERG PRESS Filed Dec. a1, 1925 INVENTOR Y g 8.6:.H9g/ ATTORNEY-S.

Oct. 16, 1928.

Patented oer. 16, 1928. I

v UNITED STATES PATENT-OFFICE.

ALr mn 'IBREDENBERG, or cnAMPLA N, NEW YORK, ASSIGNOR or ONE-HALF T in. w. a c. B. snnmn m COMPANY, A CORPORATION on. NEW YORK,,-AN D ONE-HALF TO THE SHERIDAN IRON woaxs, A'CORIPORATION or new, YORK.

Application filed pecember 31, 1925. Serial No. rams.

This invention relates to presses, and more during the upward pressure of the, lower particularly to presses for delivering flat pressure upon .leather or analogous sheet material- 1 5- 'The principal object of the present. invention is to afford a press for leather or similar material in which a powerful flat or plating pressurecan be imposed upon themateri-al, and at the same time a smoothing or ironing action effected so as to improve the product and in the case of leather to bring out a su-' perior or glossy finish. A particular object isto'afi'ord a mechanism adapted to be added as an attachment. to' existing presses and which will enable the combined plating andironing action to be effected thereon. Other and further objects and advantages of the present invention will be pointed out'in the.

. hereinafter following description of one embodiment thereof, or will be apparent to those 'skilled in the subject. To the attainment of such objects and advantages the presentinvention consists in the novel press-or attachment for presses, and the novel features of combination, arrangement, method,- operation, structure and detail herein illustrated or described.

In the accompanying drawings Fig. 1 is a perspective"view of a press of the well known Sheridan type, adapted for plating leather and the like, and embodying the principles and structure of the present invention, the novel parts being indicated as an attachment or supplement to the Sheridan machine.

of the mechanism particularly constituting the attachment shown in Fig. 1, partly broken away-to show certain interior construction. Fig. 3 is a top plan view of the mechanism 40. shown in Fig. 2, partly broken away to show the structure Lof certain interior elements.

Fig. 4 is a perspective view of a press having the invention embodied in the head rather than the bed.

The general parts of the press need not be described in detail as they constitute the well known Sheridan press, in some respects similar to prior Patent Number 1,285,600 of November 26,1918, and embodying the pres- Patent Number 821,079 of March 22, 1906. Above the frame base 5 are a system. of upright guide rods 6, sometimes referred to as tension rods, receiving the'tension created Fig. 2, on a larger scale, is a 'front elevation sure producing principles disclosed in priorplaten or rising bed 7 The machine is usually -power operated, through a shaft-8, and

' at the underside of this is mountedthe upper platen 11, which may be maintained in a.

heated condition through steam connections 12 v v The'present invention involves the method posite faces thereof, while causing relative lateral roning or wiping movement. Preferthe connection from this shaft to the toggle of pressing sheet material which consists in applying squeezing pressure against the opably an increasing resistance of a. resilient yielding character is opposed to the -squeezing movement during the relative lateral movement, and preferably the action is completed. by a positive'or rigid squeezing movement after the termination of the lateral sliding or ironing movement. This method is herein shown carried out by meansof apair of -opposite.pressing members or platens having means for forcing them relatively together as described w1th supplemental'means causing the'relative lateral movement durlng the approach of the platens; one of the platens, sliding against the face of the material,

preferably having means for maintaining it hot soas to improve the ironing efiectand give a glossy finish.

The novel part of the press is shown as an attachment adapted to be attached to one of the pressing members, the head or the bed of the press, preferably the latter, and having 4 a base or rigid frame portion l4,'with out v standing angle irons or projections 15 "by.

which it is attached to the bed 7, and apressing member or platen 19 normally spaced away from the base, with'means causinglat eral movement of such platen asth'e pressure causes itsapproach toward the base. The base part 14 of the attachment is shown also 7 having guide plates 16 adapted to confine and guide the platen in its relative movements. The base is also shown formed with a number of shallow longitudinal grooves 17 adapted to retain lubricant or oil and to accommodate certain sliding parts to be referred to.

The relatively shifting platen 1.9 normally stands slightly away from the base 14 as stated, and as shown in Figs. 1 and 2. The

determined by a pair of angle irons .20 standing downwardly from the right end of the platen.

. shown formed with a number of recesses 24,.

platen and contacting the end of the base as shown. This constitutes. a stop or limlting means determining the initial position of theplaten.

'site end of the platen are shown initially Similar angle irons 20at the oppo spaced slightly away from that end of the base, sufliciently to permit the desired hori zontal or lateral shifting of the platen during its approach to the base.

The base 14 and platen 19 are so connected that normally they are pressed yieldingly apart yet when caused to approach are coinpelled to undergo the described relative lateral movement. The lateral movement may be effected by a cannning or toggle action, and for this purpose a system of inclined parallel links 21ar'e shown, connected to the base 14 by studs 22 and connected to the platen by studs 23. The li'nksmay'stand at about so that the relative approaching movement of the platen and base is accompanied by an equalhorizontal or lateral movement of the ln order to hold the two members normally yield-ingly apart a'system of compression springs or the equivalent may be employed, although if the attachment were applied to the head of the press a separating action might be obtained by gravity. The platen 19 is distributed throughout the area of the platen, each containing a headed stud, or inverted mushroom pin 25, surrounded-by a strong helical spring 26 pressing upon the platen and pressing down on the stud head. The several stud heads rest in the shallow grooves 17 in the base member, and are thereby lubricated in their lateral sliding movements. A piece of leather or sheet material L is shown laidover the shiftable platen 19,"be

neath the upper platen 11. When the pressure mechanism causes the relative squeezing movement, preferably a'lifting of the press bed 7 the platen 19 will first rise vertically until the leather is in contact with both platens, as seen in Fig.2, and thereafter the continued lifting movement of the bed will cause the compression of the leather, accompani ed by the lateral i'roning'or wiping movement of the platen-1.9., caused by the links 21, opposed by the springs 26, until the preexisting spacebetwen the platen and base is closed, whereupon the power connections give a. rigid or positive pressure. It will be understood that the leather L is preferably placed on the platen 19 with its face uppermost-, and that the leather moves laterally with the platen 19, 'so that the leatheris slid along under the polished face of the heated upper platen 11,- and thereby effectively smoothed and ironed. The motion of the upper face of the platen 19, and of the leather,

. M on Fig. 2, the curved bend in the arrow representing the transition from rising to horizontal movement, duringwhich the leather is put under-initial compression. Owing to the great number of strong springs between the lower platen and its base the squeezing pressure will be high throughout the Wiping or ironing movement. Various other mechanical means could be employed to give substantially the same action, the principle being that the platen 19 is initially in a floating condition suspended above-the base, with i any guiding or camining means compelling it to move sideways as; the squeezing pressure closes the space between the platen and base. The yielding means between' the platen and base might be of various forms so long asit maintains a substantial resistance to yield ing as the platen approaches the base, the springs being advantageous in affording a progressively increasing [resistance during this movement, terminated by a positive pres-- sure without yield at the end of the ironing action. Substitute resistance means may comprise pneumatic orhydr'aulic pressure arrangements, or the pull of heavy weights.

In Fig. 4 the wiping means is attached to the head, the bed being constructed with a. drooping" extension like prior Patent 1,344,214 of June 22,1920, spaced away from the frame. Therising bed 108 isseparated by works with the system of compressed springs 05 associated with the upper platen and analogous' to the springs in Figsu2 and 3. The

links 116 are connected by studs 125 and 126 to the baseiand platen respectively and these being inclined compel a resultant movement 11 in the direction of the arrow 127.

It will thus be seen that there has been described a method of pressing sheet material such as leather, and a leather press, em-

bodying the principles and attaining the advantages of the present invention. Since many matters of combination, arrangement, method, operation, structure and detail may be modified without departing from the principles it-is not intended to limit the invenmo tion in such matters except so far as specified in the appendedclaims.

What is claimed is:

'1. An ironing or wiping attachment for platen presses, comprising a base attachable to one of the press members of the press, a platen normally spaced from the base, and. means causing lateral movement of the platen as the pressure causes it to approach the base.

, means for forcing them mally spaced away 2. A'press for leather or other sheet mate-j members or platens, relatively together, and means causing a relative lateral ironing or wiping movement between the platens dur ing the approach of'the platen-s. v

3. A press as, in claim 2 and ofthe. platens has means for maintaining it hot during its lateral movement against the face of the material.

4. In .a' press for sheet material, power operated pressing members, a platen norfrom one of said-*members, means resisting the yield of the and means causing lateral shiftingofthe platen during its yield.

5. A press as in claim tand, wherein the means causing the lateral movement consists of slanting links or toggles connected to the platen 6, A press as rial comprising pressing in claim i t and wherein the 4 means resisting the yield of the platen com- 1 ing member and the platen'..

prises resilient members or springs.

7. A pressas-in claim Land means resisting theyield of the platen com prises a large number of resilient members,

distributed over the area between the press- "81 A- press as in'claim 4"and wherein the means resisting the yield of the platen com prises resilient mem ers'or springs, and the platen having a limiting meansdetermining' its initial position. a

9.. A press for sheet material comprising :power operated platens, .one.of said platens initially spaced away from its supporting yieldingly holding-the base, spring means platen so spaced,- and meanscausmg ironing movement of the platen during the yielding of such spring means.

spring meansplaten,

' terial comprising wherein Y the v wherein the yielding of -the \J 10. A press as in claim 9 and wherein the spring means comprises numerous coil springs inverted mushroom pin for each'spring, the spring surrounding the sten'rthereof.

11. A press as in claim 9 and wherein the comprises inverted mushroom pin for each spring, the spring surrounding the stem thereof, and the base formed with whichthe pin heads slide during the yielding and returnmovements of the springs.- a 12 A leather press for pressin sheet ma- .the upper and lower press members mounted in the frame, power mec anism for pressing them together, one of the press members having a support and mounted to recede towards its support while resisting the pressure, and a system of devices compelling' the receding member'to shift side- Waysandthus give awiping or ironing action upon the leather.' 13. A leather press as in claim 12 and wherein it is the lower press member thathas the side shifting receding movement.

14. A leather press as in claim 12 and wherein are means whereby the receding is. limited and stopped so minates with a positive pressure without side in claim 12 and press member is many of which member 15. A leather. press as resisted byresilient, springs, are compressed between. the press and its support at distributed points.

'In testimony whereof, I have affixed signature hereto.

' ALFRED BREDENBERG;

between the platen andbase and an numerous coil lubricating grooves in that the action .ter- 

